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S. M. O. BANGEN.

| 1 SEPARATOH FOR THRESHING MACHINES.

GRAI

APPLICATION FILED APR. 30. 1915.

Patenfed A11 8, 1916.

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Specification of Letters Patent.

Patented Aug. 8, lfiii.

application filed April 39, 1915. Serial 25,013.

pose which shall be of smaller dimensions, simpler mechanism, easier and requiring less power to operate, will last longer, be cheaper to manufacture. and which will do better and more work in a given time than many or" the grain separators now in use and on the market.

In accordance with the present invention the grain separating portion of the thrcsher comprises a straw engaging rotary member and a screen underlying said. rotary member with the parts constructed and coupled up to the driving power for rotation at a speed whereby the straw and grain delivered by the threshing cylinder is agitated and moved over the screen in a manner to thoroughly separate the grain from the straw, which latter freed from grain is ultimately discharged from the machine.

.The' straw after leaving the threshing cylindor is delivered directly upon the screen where it is first engaged by a rotating series of blades serving' to collect the straw as it is delivered by the threshing cylinder and in vturn direct the straw upon the rotatable boat-er having: series of fingers or prongs of tiicient length and curvature to throw the straw from one tooth or prong to the next along the entire length of the rotor. This action, which relatively slow, is sullicicntly prolonged to insure the thorough separation of the .Qjrain from the straw and y the directing: of the grain through the screen located beneath and at" the sides oithe rotor, while the st a is finally discharged from that end of the machine remote from the threshing: cylinder.

The rotor is driven at a slow speed as compared to the speeds usually employed and all auxiliary devices. such as fans and the like, or any-means tor producing blasts or streams of air. are omitted and are in fact wholly unnecessary and detrimental.

56 The imention will be best understood from a consideration of following dc" taihad description, taken in connection with the accompanying drawings forming part of thisspecification, with the further understainling that while the drawings show a practical form of the invention, the latter is not confined to any strict conformity with the showing of the drawings, but may he changed and. modified so long as sucl changes and. ix'i wlifir..'ations mark no material departure from the salient features of the invention.

In the drawings: l igure l. is a longitudinal vertical, section oi a separator constructed in accordance with my invention and shaming: so much of the thrcshcr as is necessa. y for an undcrstamling of the device, all other parts of the thrcshcr being omitted. Fig. 2 is a section on the line 22 of Fig. 1. Fig. 3 is a plan view of the structure of Fig. l with some parts broken away. Fig. is an ehrvation of the gather-er. Fig. 5 is an edge view of the gathercr.

Referring to the drawings there is shown a i i-aunt: l which may be considered as adapted to sustain various mechanisms employed in a threshing machine, witlunit. however, any attempt to show a frame adapted to any particular type of threshing machine, since the invention may be variously modified without departure from. the spirit thereof.

At one end there is mounted a threshing drum 2 which may be considered as having associated therewith the usual. concave 3. Vin line with the KlISClHH'QL side of the cylinder 2 is :1 screen} shown as approximately sc ni-circular in "cross-section and consideral lly elongated. l 'hisscrecn may he made of pcri'oratml metal, indicated in the (li'zllllllfls', or may be made in. any other way or of other material and may be other-wise shaped than shown.

Mounted on suitable cross pieces 5 ofthc main frame are ournal hearings 6 each supplicd'with a lubricant receptacle 7 in position to be readily accessible for filling. In the journal hearings or boxes ll are journaled the end portions of a shaft 8 extending: lengthwise of the machine above the bottom of and in suitable relation to the screen 4. The shaft is shown as carrying an elongated cylinder 9, but this may be taken as indicative of any kind of a support for series ol lingers or prongs 10. which series extend lonnitmlinally of the shaft 8 and cylinder or hub 9 within the space between the bearings Rising from the sides of the screen 4% are upright walls 1L and rising from cross beams 5 are upright end walls'12, and above these sideand end walls is a cover 13. The ends of the screen 4; arc, however, free from. closing walls, so that straw and grain from the threshing cylinder have free entrance thereinto and straw has free escape from the other end of the screen. The lingers 10 project laterally oi the longitlulinal radial plane in which the particular series to which they belong is located, at an. angle thereto which may approxin'iate forty-live degrees, but such angle is si'isceptiblc of variation. Each finger is bent toward the discharge end of the separator first away from the cylinder or hub 5), as shown at 10, and then toward said cylinder or hub, as shown at 10, andthis double bend, together with the general trend of the fingers or prongs toward the dis charge end ofthe separator causes the fingers iii-prongs to engage the straw in. such av manner as to both lift the straw and propel it toward the discharge-end of the separator.

At that end of the shaft 8 or hub 9 adjacent to the threshing cylinder there is made fast thereto a series of flat or blades 14, which in the particular showing of the drawii'igs are four in number, but may, of course, be of other number. These blades are preferably given a slight trend at their outer ends toward the discharge end of the machine, and also a'slight twist, such outer ends being indicated at 15. The arms or blades 14 serve to receive the straw as it comcs'i'rom the threshing cylinder and di rect it to the fingers or prongs 10 so that the latter may receive the straw with the grain therein and in turn propel the straw toward the discharge end, throwing such straw from one finger or prong to the next along the length of the hub or cylinder.

The revolving series of fingers in the substantially half circular screen causes the straw to be agitated, spread, scattered, and thrown about, while being constantly propelled toward the discharge end of the machine. The straw is moreover thrown around the cylinder or hub, which together with the fingers may be termed the rotor, several times before it escapes from the machine, and this gives ample opportunity for the grainto fall out of the straw and down into suitable grain pans which may be located beneath the screen 4-,but which are "arsenal is too slow to. produce any marked air currents. it is to be understood that the blades ll are not fan blades, and are not intended to cause any active streams of air, but are solely intended to receive the straw from the threshing cylinder and properly distribute it to the propelling fingers 10 carried by the separator cylinder or hub.

The separator of thev present invention consists solely of the rotatable series of propelling lingers shaped to lift and agitate the straw, the distributing blades at the en trance end of the separating chamber and the screen under-riding the separating cylindcr and forming the lower part of the separating chamber, the parts being associatcd with the threshing cylinder to receive the thrcshcd grain at one end of the screen at a point lower than the axis of the separating cylinder, and to discharge the straw freed from grain at the other end of the machine.

Such a. separator has been found to be highly ellicient in. actual practice, and has been also found to wholly eliminate any necessity of tans or air moving'i'neans producing streams of air. Moreover, theseparation of the grain from the straw has been found to be particularly thorough while the mechanism needed for the purpose is reduced to a minimum. oi manufacture and low cost of operation. with the attainment of a result equal or superior to the results obtained by'other separators, whereinrelatively high speed of the agitator and fans or other air stream producing mechanism has been employed.

What is claimed is 1. A graii'i separator for threshing machines comprising a rotor having straw propelling fingers thereon, a straw directing de' .\'ice at the rcceivu'ig end of the propelling means and (ainstituting a part of the rotor, a screen undcrriding the propellingmeans, and means tor driving the mate at a relati vcly slow speed as compared with the speed oi the threshing cylinder.

A. grain separator for threshing machines, comprising an elongated rotor hav- .ing longitudinalseries of. straw engaging fingers or prongs thereon directed toward the discharge end. of the separator at an angle to the length of the respective series, means at the receiving end of the separator for distributing the straw to the fingers, a screen in underridingrelation to the rotor and having extensions rising at the sides of the rotor, and means for feeding the straw to the bottom portion of the receiving end of the screen,

3. A grain separator for threshing ina-- chines, comprising an elongated rotor having linigitedinal series or straw engaging or infiongs thereon directed toward the discharge end. of the separator at an angle to the length of the respective series, means on and fast to the rotor and confined solely to the receiving end of the separator for distributing the straw to the fingers, and a screen in underriding relation to the rotor and having extensions rising at the sides of the rotor, said screen having a threshing cylinder associated therewith to deliver the threshed grain. to that end of the screen provided with the straw directing means at a point below the axis of rotation 'of the rotor..

.eLQA grain separator for threshing machines comprising an elongated screen curved in cross-section and adapted to receive threshed grain at one end and dis {:harge the straw at the other end, and a straw propelling and agitating means comprising a rotor in substantially concentric relation to the screen, said rotor having straw engaging fingers or prongs bowed away from the axis of rotation and arranged in longitudinal series with each finger at an angle to the length of the axis of rotation with the free end of the finger more distant twisted in a direction to engage and distribute the stray to the propelllng fingers.

In testimony that I claim the foregoing as my own I have hereto aiiixed my signature in the presence of two witnesses.

SIMON M. O.' BANGEN. Witnesses:

O. O. CHRIsTIANsoN, T. T. MORKEN. 

